Systems and methods for retractable fan cooling of electronic enclosures

摘要

Systems and methods for a retractable fan cooling system for an electronics enclosure are provided. In one embodiment, a system comprises at least one cooling fan coupled to an electronics enclosure having a heat sink; and a fan positioning mechanism coupled to the at least one cooling fan. When a temperature inside the electronics enclosure is less than a first temperature, the positioning mechanism places the at least one cooling fan into a retracted position that does not inhibit a natural convective air flow across the heat sink. When the temperature inside the enclosure is greater than a second temperature, the positioning mechanism places the at least one cooling fan into an engaged position that produces a forced air flow across the heat sink.